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RAILWAY SIGNAL.

No. 490,626. Patented Jan. 24,- 1893.

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No. 490,626. I Patented Jan. 24, 1893..

UNITED Saree FFIGEQ ATENT IRA L. GREEN, OF KITTANNING, ASSIGNOR, BYDIRECT AND MESNE ASSIGN- MENTS, OF FIVE-SIXTHS TO JAMES M. PATTERSON, OFSI-IARPSBURG,

GEORGE M. FOX, VVYII-IINGTON REYNOLDS, AND CHRISTOPHER C. SHADLE, OFKITTANNING, AND MARCUS D. WAYMAN, OF FORD CITY, PENNSYL- VANIA.

RAILWAY-SIGNAL.

SPECIFICATION forming part of Letters Patent No. 490,626, dated January24, 1893.

Application filed January 9, 1892.

To all whom it may concern;

Be it known that I, IRA L. GREEN, acitizen of the United States,residing at Kittanning, in the county of Armstrong and State ofPennsylvania, have invented certain new and useful Improvements inElectrical Railway-Signals; and I do hereby declare the following to bea full, clear, and exact description of the invention,such as willenable others skilled in the art to which it pertains to make and usethe same, reference being had to the accompanying drawings, which form apart of this specification.

This invention has relation to electrical railway signals, and itsobject is to provide a simple and practical means whereby a trainentering a block will, if there is another train in the same block,cause the sounding of'a continuous alarm and the display of a visualsignal in the engineers cab until the circuit is broken by the engineerthus positively notifying the engineer that thereis atrain in the sameblock, and which will also when it leaves said block so operate theparts of the apparatus of the preceding block that they will not operateto sound an alarm or display a Visual signal, so that when no alarm issounded or signal displayed,the engineer willknow that the block he isentering is clear of trains. This object is accomplished by theconstruction illustrated in the accompanying drawings, in which Figure 1is a plan view of that part of my improved apparatus which is locatedbeside the track. Fig. 2 is a side elevation of the same. Fig. 3 is adetail representation of the means for closing the circuit through theapparatus of the preceding block. Figs. 4 and 5 are respectively a viewof the underside and a plan view of the movable sleeve. Fig. 6 is a sideview of said sleeve and a part of the rod upon which it slides. Fig. 6is a detail of a rod upon which the sleeve slides. Fig. 7 is a detailrepresentation of a part of the magnet with its armature, the main barof the locking mechanism and the hook for engaging said locking bar.Fig. 8 is a detail view of the trigger which is operated upon by SerialNo. 417.468. (No inodel.)

the sleeve to raise and lower the main barof the locking mechanism. Fig.9 is aface View of the signaling mechanism in the engineers cab,with thedoor of the case closed. Fig. 10 is a longitudinal section through thesame. Fig. ll'is a side view of the forward part of a locomotive and thelever I. Fig. 12 is a detail view of the contact plates carried by thepilot of the locomotive. Fig. 13 isa detail view of the trip lever fordepressing lever E. Fig. 14 is a side view of a portion of a car,thelever E, and the trip lever for depressingsaid lever E. Fig. 15 is anend view of the same. Fig. 16, is a diagrammatic view, showing threeblocks and the wires extending from one to the other, and Fig. 17 is aperspective view of one of the track instruments, with the ends of thelevers and bed plate broken off.

The same letters and numerals of reference are used to designate thesame parts in the several figures.

A designates the bed plate of my improved apparatus, which is situatedin juxtaposition to the rail B of the track. Supported in suit ablebearings mounted upon this bed plate is a transverse shaft 0 the end ofwhich extends under or through the rail of the track. This shaft carriesa segment D and a lever E, said lever being located in position to beengaged by a trip lever F, carried by the rear car of the train.

G designates a longitudinally movable bar which has at one end a seriesof teeth, 9, intermeshing with those of the segment D, and near itsopposite end alug, g, adapted to engage an end of the sleeve H and movethe same rearward. This sleeve H is formed on its top near one end withan opening, h, on its bottom near its opposite end withan opening h,(said opening it having an inclined inner wall h) and on one'side withan open ing h'. It is loosely mounted on a rod H which is encircled by acoiled spring H that presses against the rear end of said sleeveand-tends to keep the latter in its foremost position, and at a suitablepoint is formed with anopening H To the forward end of this sleeve H ispivoted the rear end of the lever I, which has an inclined lug 71projecting from its underside. A stand J projects from the bed plate andhas an inclined upper surface j engaged by said lug 2, as indicated bydotted lines in Fig. 2.

K designates a transverse bar, which is fulcrumed near its inner endwithin a frame it. The inner extremity of this bar passes into thesleeve II through the opening h and also into the rod [1 through anopening in the side thereof, and is provided with a trigger K having aninclined surface 71;. This trigger K extends at right angles with thebar K and its upper end is adapted to be projected through the opening11 in the rod II into the opening h of the sleeve H. This bar K isnormally inclined as shown by dotted lines in Fig. 7 and in thisposition of the bar the trigger will be in the position shown in dottedlines in Fig. 6, but when a train enters the block the trip lever Fcarried thereby engages the lever E, depressing the forward end of thesame and causing the shaft G and segment D to rotate a part of a circle,thus moving the bar G rearward a sufficient distance to bring its lug 9into engagement with an end of sleeve II and to move the latter throughsuch engagement into position where its inclined wall 7L" will engagethe inclined surface of the trigger K and elevate said trigger, thuscausing said bar K to assume the horizontal position shown in full linesin Fig. 7. In this position of the bar K the upper end of the triggerwill project through the opening H in the rod H into the opening it inthe sleeve H, and the outer end of the lever will be engaged by a hook Lwhich is flexibly held in proper position bya spring Z, the sleeve beingthus locked in its rearinost position. The lever I being secured to thesleeve moves with the same, and the rearward motion of the sleeve causesthe inclined lug 2' to ride upon the inclined surface j of the stand J,thus elevating the forward end of said lever, in which position it isheld while the train is in the block. Immediately upon the disengagementof the lever E and trip lever F said lever E is returned to its originalposition by means of a spring E and it is therefore necessary that saidlever E be engaged only by the trip lever of the last car of the train.I therefore hinge the trip levers to blocksfsuitably supported at therear ends of the cars, whereby they may be raised to position out of theWay of lever E, in which position the trip levers on all of the cars ofthe train, except the one on the end car, are located. The upper end ofthe vertical portion of the trip lever abuts against the edge of a blockF so that it will be rigid against rearward movement when it strikeslever E.

M designates an electro magnet between the helices of which the outerend of the main locking bar K extends.

N designates a lightning arrester; 1, 2 and 3 designate binding postsnear said lightning ceding block.

arrester and O designates a longitudinally movable rod carrying acontact point 0 located adjacent to the sleeve II and to a contact plate0, said rod being encircled bya coiled spring 0 which tends to keep itin its normal position with its contact point 0 away from contact plate0. This contact point 0 projects laterally into the path of a lug 72,extending from the sleeve, and is moved into contact with said plate bythe rearward movement of said sleeve. hen the contact point 0 and plate0 are in engagement with each other the circuit will be completedthrough the magnet of the preceding instrument, causing said magnet todraw upon its armature m which pushes the hook L out of engagement Withthe end of the bar K and allows the spring II, to force the sleeve H andlever I forward. As this sleeve H is moved forward it engages thetrigger K and forces the same downward and the outer end of the bar Kupward. The forward movement of the sleeve also causes the lug its to bedisengaged from the contact point 0 and allows the spring 0 to draw saidrod to its normal position. Thus it will be seen that a train as itenters a block raises the lever I at the entrance thereto and alsolowers the lever E at the entrance to the pre- It will of course beunderstood that one of the above instruments is located at the entranceto each block, and in Fig. 16 I have for convenience sake designated theinstruments as 00, y and z.

The circuit is as follows; starting from ground the current goes tobinding post 2 of instrument as, by wire 4, thence to strap a of thelightning arrester; to back part of rod 0, by wire 5; from contact plate0 to strap 01 from strap M, to binding post 3, from binding post 3 toone pole of battery of instrument y, by wire 6; thence from other poleof battery to binding post 1 of instrument Y; to strap 02 of lightningarrester of said instrument; to magnet; from magnet to strap 12 oflightning arrester; to binding post 2; and thence to the ground.

Q designates the pilot of a locomotive. This pilot carries a plate Q towhich is pivoted a plate R, formed with a curved under surface andprovided on its upper side with a contact plate 0 adapted to contactwith a contate points, projecting from a plate S said plateS beingsuitably supported on the plate Q and insulated therefrom. T designatesa case located within the engineers cab and provided with a door U. Theforward end of this case has an opening within which is inserted a glass25, preferably red in color, and behind which is a lamp If. The door Uhas projections u and 'u on its inner side and a knob u on its outerside. V designates an electro magnet, V a battery, V' a bell, V aclapper and V a casing within which is a suitable electricbell-operating mechanism. The armature o of the electro-magnet ispivoted at its upper end and its lower end is binding post 12, which inturn is connected with the magnet V by wire 13, said wire extending fromsaid magnet to binding post 14, thence by wire 15 to plate Q. By thismeans if the lever arm I is in its elevated position, the plate R cominginto contact therewith will be pushed upward and its contact point rengaged with contact point 3, thus completing the circuit through themagnet V and causing the same to attract its armature, whereby the doorU will be released and allowed to drop thereby disclosing the visualsignal. When the door drops its projection 11. engages a contact plate22, thus completing the circuit through the bell, and causing an audiblealarm to be sounded. This latter circuit commences at one pole of thebattery, goes to binding post 12 thence, by wire 16, travels to bindingpost of the bell operating mechanism; thence through the bell circuit tothe other binding post of bell-operating mechanism; thence by wire 17 tocontact plate 22', thence through the door and bell wire 18 to bindingpost 13 thence to the other pole of battery.

From the above the full operation of my invention will be readily seen.As a train onters a block its trip lever F engages the lever E thusdepressing the same and elevating the outer end of lever I which latteris locked in such position and held until the train enters the nextsucceeding block. If a train enters a block during the period of anothertrains occupancy thereof the plate R will engage the elevated end oflover I and the circuit be closed as above described, the door Ureleased and allowed to drop and display the visual danger signal. -Whenthe door has dropped its projection 11. will be in contact with thecontact plate 1), thus completing the circuit through the bell andcausing an audible alarm to be sounded. The light will be displayed andthe alarm will be sounded until the circuit is broken by the engineerraising the door to its normal position by its handle u This sounding ofan audible alarm and displaying of a visual signal within the engineerscab will be found to be an extremely effective means for attracting theengineers attention to the fact that he is within a block alreadyoccupied by another train. It will of course be understood that if theblock is clear of trains the lever I will be in its depressed positionand therefore will not be engaged by the plate R so that no alarm willbe sounded or signal displayed.

Having thus described my invention what I claim is 1. In a railwaysignal, the combination with the shaft, a segment mounted on said shaft,and a lever also mounted on said shaft, and

located in the path of a trip lever carried by a train, of alongitudinally movable bar having teeth intermeshing with the teeth ofsaid segment, a sleeve adapted to be moved rearward with said movablebar, a lever pivoted to said'sleeve, and adapted to move with the same,a means for elevating the forward end of said lever as it is movedrearward, a means for locking said sleeve in its rearward position, anda means at the entrance of the succeeding block for releasing saidsleeve.

2. In a railway signal the combination with a movable sleeve, a leverpivoted to said sleeve, and movable therewith, a transverse locking bar,having a trigger mounted on one of its ends, said trigger being operatedby said sleeve, and a hook adapted to engage the opposite end of saidlocking bar whenthe same is in its abnormal position, of means formoving said sleeve rearward when a train enters the block, means forelevating the forward end of said lever when it is moved rearward; meansfor disengaging said hook from the locking bar when'the train has leftthe block, and means for forcing said sleeve to its normal position whensaid locking bar has been released.

3. In a railway signal, the combination with a movable sleeve, havingopenings in its top, bottom and side, the opening in the bottom of saidsleeve having an inclined wall, a rod upon which said sleeve is mountedloosely, said rod having a vertical opening adapted to register with theopenings in the top and bot-' tom of said sleeve, a locking bar havingits inner end extending through the opening in the side of said sleeveinto said rod, and a trigger mounted upon the inner extremity of saidlocking bar and located within the vertical opening in said rod, saidtrigger having a beveled edge adapted to be engaged by the inclined wallof the opening in the bottom of said sleeve, of a lever, pivoted to saidsleeve and movable therewith, means for elevating Ioo said lever as itis moved rearward, a means engaging the locking bar, whereby the sleevewill be locked in its rearmost position, a means at the entrance of thesucceeding block forireleasing said locking bar, and a means for forcingthe sleeve to its foremost position when said locking bar has beenreleased.

4:. In a railway signal, the combination with a movable sleeve, alongitudinal lever pivoted to said sleeve and movable therewith, atransverse looking bar fulcrumed near its inner end and adapted to haveits outer portion depressed by the rearward movement of said sleeve, anda hook for engaging the outer end of said locking bar, of anelectro-magnet in the circuit with the next succeeding apparatus, thearmature of said electro-magnet bein g connected with said hook, meansfor forcing said sleeve to its forward position when the hook isdisengaged from the locking bar, and means for elevating the forward endof the longitudinal lever when the same is in its rearward position.

5. In a railway signal the combination with a longitudinally movablelever adapted to be moved rearward when a train enters the block, meansfor elevating the forward end of said lever as it is moved rearward, atransverse bar for locking said longitudinal lever, of a hook forengaging the rear end of said looking bar when the longitudinal lever isin its rearmost position, an electro-magnet in the circuit with theapparatus at the entrance to the next succeeding block, the armature ofsaid electro-magnet being connected with said hook, whereby the hookwill be disengaged from the locking bar when the train has passed out ofsaid block, and means for forcing said longitudinal lever to itsforemost position when said hook is disengaged from said locking bar.

6. In a railway signal, the combination with the shaft, a segmentmounted on said shaft, a lever, also mounted on said shaft and locatedin the path of a trip lever carried by said train, whereby it will bedepressed when the train enters the block, a longitudinally movable barhaving teeth intermeshing with the teeth of said segment, a lever, I,connected with said bar and moved rearward by the same, and means forelevating the forward end of said lever when it is in its rearwardposition, of a transverse bar for locking said longitudinal lever, ahook for engaging the rear end of said locking bar when the longitudinallever is in its rearmost position, an electro-magnet in the circuit withthe apparatus at the entrance to the next succeeding block, the armatureof said electro-magnet being connected with said hook, Wherebythe hookwill be disengaged from the lockingbar when the train has passed out ofsaid block, and means for forcing said lever I to its foremost positonwhen said hook is disengaged from the locking bar.

7. In a railway signal, a longitudinal lever I having a beveled lug 2',and means operated by a train entering the block for moving said leverrearward of a stand having an inclined surface engaging said beveled lugi whereby the end of the lever will be raised simultaneously with therearward movement of said lever, means for locking said lever in itsrearward position, means operated by the train passing out of said blockfor releasing said lever, and means for forcing said lever to itsforemost position when released.

8. In a railway signal, a longitudinal lever I pivoted at its rear end,said lever being located at the entrance to a block, means operated by atrain entering the block for moving said lever rearward, and means forraising the forward end of said levers simultaneously with the rearwardmovement thereof, of means for locking said lever in its rearwardposition, means operated by the train passing out of said block forreleasing said lever, and means for forcing said lever in its foremostposition when the same is released.

9. In arailway signal, the combination with a visual signal located inthe engineers cab, an electro magnet, having its armature pivoted at oneend and a hook at its opposite end, and a door having a projectionadapted to be engaged by said hook of the armature and the door therebyheld in position to cover the signal when the magnet is not energized,of means for energizing said magnet upon the entrance of a train into ablock occupied by another train, whereby the armature will be attractedand the door released, thereby displaying the visual signal, asspecified.

10. In a railway signal, the combination of a case located in theengineers cab, a lamp in said case, a glass in front of said lamp, anelectro-magnet having its armature pivoted at one end and its oppositeend hook-shaped, a door having a projection adapted to be engaged bysaid hook-end of the magnet, means for energizing said magnet upon theentrance of a train into a block occupied by another, and therebydisengaging the armature from the door, and allowing the latter to dropand display the visual signal, with a projection 11. on said door,acontact plate 12; an alarm bell and a bell-operating mechanism in thecircuit between said contact point and bell, whereby when the door hasdropped its projection u will be in contact with contact plate 11' andthe circuit closed through the bell, substantially as described, wherebyboth a visual signal Will be displayed and an audible alarm sounded inthe engineers cab if he I enters a block occupied by another train, as

specified.

11. In a railway signal, the combination with a lever I located at theentrance to a block, means for raising the same when a train enters theblock, means for locking said lever in raised position while the trainis in the block, means at the entrance to the succeeding block forreleasing said lever when the train has left the block, and means forlowering said lever when the same is released, with a pivoted platecarried by the train and carrying a contact point, said plate beingarranged to be elevated by said lever when the latter is in its elevatedposition, a contact point adjacent to the contact point on said plate,an electro-magnet in the engineers cab, electrically connected with saidcontact point, the armature of said magnet being pivoted at one end andhaving a hook at its other end, a visual signal in the engineers cab,and a door for normally covering said signal, said door having aprojection engaged by the hook end of said armature, substantially asdescribed and for the purposes specified.

12. In a railway signal, the combination with a lever I located at theentrance to a block, means for raising the same when a train enters theblock, means for locking said lever in raised position while the trainis in the block, means at the entrance to the succeeding block forreleasing said lever when the train has left the block, and means forlowering said lever when the same is released,

with a pivoted plate, carried by the train and carrying a contact point,said plate being arranged to be elevated by said lever when the latteris in its elevated position, a contact point adjacent to the contactpoint on said plate, an electro-magnet in the engineers cab,electrically connected with said contact point, the armature of saidmagnet being pivoted at one end and having a hook at its other end, avisual signal in the engineers cab, a door for normally covering saidsignal, said door having projections located one above the other, thelower of said projections being normally engaged by said hook end of thearma-

